With his precum and cum mixing and dripping down his shaft, it became a lot slippery. Vanessa's hands moved freely, stimulating his cock like never before, causing him to eject another round shortly after.
Just as she did before, she controlled the ejected cum and gathered them into the collection bottle, keeping them "fresh" and "uncontaminated."
*Lick~!*
Vanessa continued, licking her lips as she removed the glove, feeling that it was getting in the way. With her bare hands, she touched his shaft lovingly and carefully—before gripping it tight in one go.
"...!"
Aster's body twitched from the mix of pain and pleasure. The warmth of her hand, and the tightness made him feel ecstasy beyond what he felt before, making his back tingle. He could feel needles pricking his palms and feet, as his body got hotter and hotter.
"Haa...!"
He just came two times in a row, but he felt like he'd climax the next instant if he let his guard down! Drool dripped down his lips as he struggled to keep his eyes open, barely supporting his body to remain upright with his arms.
Aster felt like he was a toy before Vanessa. He couldn't fight back at all, and ended up coming five times before 10 minutes even passed.
"T-Time out..." Aster gasped, trying to catch his breath.
He never thought he could cum five times in a row himself. It was a new discovery! Vanessa stared at the collection bottle, showing that she reached her target of 20 mL successfully.
"Alright, wait a bit. I'll go and place this sample to safety first."
Vanessa stood up, walked to a wall, and tapped it. To Aster's surprise, it was a fridge that was integrated into the wall!
She grabbed a stand from inside the freezer, and placed the gathered "sample" inside, before closing it again.
As she turned to Aster, who was still trying to catch his breath, her eyes narrowed as her body shivered lightly. She slowly removed her lab gown, letting it drop to the ground. Then, she let the shoulder straps of her dress slip to the side, allowing it to also slip down.
In a moment, Vanessa was stripped down to her underwear, a pair of adult, seductive, black, laced pieces.
"Ahhn~!" Vanessa raised a voice of pleasure, before staring at Aster with a pleased smile. "Naughty boy. Were you unable to wait any longer~?"
She focused her weight over her waist, pinning Aster down. "I didn't permit you to move yet, though? Leave it to this sister, and you'll be in for a paradise of pleasure."
She ground her hips as if trying to remember the shape of Aster's cock. Then, she lifted her hip and slammed it back down.
*PLAP!*
Aster felt the tip reaching the deepest part, kicking the door open. Even Vanessa didn't expect it, with her eyes almost rolling back from the sudden pleasure. Her body spasmed, as love juices overflowed, but she didn't stop.
*PLAP!* *PLAP!* *PLAP!*
With her hands over Aster's thick chest, she continued slamming her hips up and down like a bitch in heat.
"W-What's this... this is beyond amazing~!" She cried as she felt her insides getting deformed from his thick shaft with every thrust. "I think I'll get addicted to this cock of yours~!"
She slowly lost strength in her arms, pressing her chest against Aster's stomach, as she let out moans uncontrollably. "Ahh, haaa... Hmmm~! Fuck me! Ah! Harder~!"
As Vanessa slowly lost strength, Aster gained the ability to move. As if to match her pace, he started to slam his waist upward, going even deeper than before.
"...!"
Vanessa's face twisted as her mind slowly melted in pleasure. The scent-based aphrodisiac that she developed had already lost its efficacy, but it didn't matter to the two.
"I'm cumming~!"
"...!"
And just as she reached orgasm for the nth time, something changed that shocked Aster. Her eyes glowed as her red pupils became vertical, like those of a reptile, and her fangs grew longer. On her back, little wings like a bat's appeared, adding another hint for him.
"A succubus...? No, a vampire?!"
Vanessa's disguise fell as her consciousness faded from pleasure, falling into Aster's embrace. Her secret, which only a few knew, was exposed!